【題目】Since nobody gave him any help, he ______ have done the research on his own.

A. can B. must C. would D. need

【答案】B

【解析】

試題分析：考查情態(tài)動(dòng)詞辨析。can能； 能夠； 可以； 可能。must必須； 必然要； （做出邏輯推斷）； （表示堅(jiān)持）。would 將，將要； 愿意； 會(huì)。need必須； 不得不。句意：因?yàn)闆](méi)有人給他任何幫助，他必須獨(dú)自完成研究。故選B。

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